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650=0.7x+0.33x+x
We move all terms to the left:
650-(0.7x+0.33x+x)=0
We add all the numbers together, and all the variables
-(+2.03x)+650=0
We get rid of parentheses
-2.03x+650=0
We move all terms containing x to the left, all other terms to the right
-2.03x=-650
x=-650/-2.03
x=320+0.40000000000009/2.03
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